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Magnetics Catalog

Product catalog summary

Overview: The document is a catalog from Lake Shore Cryotronics, Inc., detailing various magnetic measurement instruments and accessories, including specifications, features, and functionalities of different models of gaussmeters, fluxmeters, and related accessories.

Magnetic Instruments and Accessories:

Model 475 DSP Gaussmeter: Features DSP technology with full-scale ranges from 35 mG to 350 kG, DC measurement resolution to 0.02 mG, and a basic DC accuracy of ±0.05%. It supports DC, RMS, and Peak measurement modes, with advanced features like autorange, auto probe zero, and field control.
Model 455 DSP Gaussmeter: Capable of measuring magnetic fields using Hall effect probes with peak measurement mode for pulsed fields and various operational modes.
Model 460 3-Channel Gaussmeter: Designed for 3-axis measurements, suitable for materials analysis and field mapping.
Model 421 Gaussmeter: High-performance instrument for magnetic measurement applications, offering improved accuracy and resolution.
Model 410 Hand-held Gaussmeter: A portable device for magnetic field measurements.
Model 480 Fluxmeter: Designed for high-resolution and low-drift analytical measurements, particularly in magnetizing processes.

Gaussmeter Hall Probes and Accessories:

Includes a variety of standard and custom Hall effect probes, magnetic field sensors, and fluxmeter coils. Specific details on selection and compatibility are provided in the catalog.

Advanced Features of Model 475:

Field Control: Built-in PI control algorithm for magnetic field control in electromagnet systems.
High-Speed Data Transfer: IEEE-488 interface for real-time reading rates up to 100 new readings per second.
Data Buffer: Internal memory for storing 1024 field readings, with high-speed data logging capabilities.
Trigger In and Out: Hardware and software triggers for synchronizing measurements with other instruments.

Display and Interface Features:

Display: 2-line by 20-character vacuum fluorescent display for field readings, probe temperature, and frequency.
Keypad: 22-position keypad for easy access to features, with lockout capability to prevent unintended changes.
Alarm and Relay: High and low alarms with display annunciator, audible beeper, and two relays for system integration.

Conclusion: The catalog provides comprehensive information on Lake Shore's magnetic measurement instruments, emphasizing the advanced capabilities and flexibility of the Model 475 DSP Gaussmeter. It highlights the integration of DSP technology for enhanced accuracy and functionality in various measurement modes.

Introduction: The document provides detailed technical specifications and features of the Model 475 DSP Gaussmeter, a device used for measuring magnetic fields. It highlights the advantages of digital signal processing (DSP) technology, which ensures accurate, stable, and repeatable field measurements.

Specifications: The Model 475 offers multiple voltage outputs, each with varying levels of signal processing. Voltage Output 2 provides a fast response for low to mid-frequency fields, while Voltage Output 3 offers extensive signal processing, including temperature compensation. The device supports both serial RS-232C and parallel IEEE-488 computer interfaces, allowing for comprehensive setup and data retrieval.

Probes and Measurement: The gaussmeter is compatible with a range of probes, each with specific frequency ranges, accuracy levels, and temperature coefficients. The document lists several probe models, detailing their dimensions, materials, and operational parameters. The device supports DC and AC RMS measurement modes, with high accuracy and resolution.

Computer Interface and Data Handling: The Model 475 includes interfaces for data logging and transfer, with a data buffer capacity of 1024 readings. It supports various baud rates and offers LabVIEW™ driver support for enhanced software integration.

Ordering Information: The document provides ordering details, including part numbers for the gaussmeter and its accessories. It also lists available calibration services and compatible extension cables.

General Features: The gaussmeter is designed for use in a range of ambient temperatures and requires specific power configurations. It is CE marked and includes features like autorange, max/min hold, and relative mode for enhanced usability.

Conclusion: The Model 475 DSP Gaussmeter is a versatile and precise instrument suitable for both industrial and research applications, offering advanced features and compatibility with a wide range of probes.

Overview: The document provides detailed technical specifications and features of the Model 455 DSP Gaussmeter by Lake Shore Cryotronics, Inc. It highlights the device's capabilities in measuring magnetic fields using Hall effect probes and its various operational modes.

Key Features:

Peak Measurement Mode: Allows measurement of pulsed fields with high-speed data acquisition, capturing transient fields as narrow as 50 µs pulse widths. The peak reading can be held indefinitely without sag.
Probe Connection: The Model 455 is compatible with a range of standard and custom Hall effect probes, enhancing measurement accuracy and flexibility.
Measurement Features: Includes autorange, auto probe zero, display units in various measurements (G, T, Oe, A/m), max/min hold, relative reading, and instrument calibration options.
Instrument Probe Features: Features like probe field compensation and temperature compensation ensure accurate and stable measurements.
Display and Interface: The gaussmeter features a 2-line by 20-character vacuum fluorescent display, with options to show field readings, probe temperature, and frequency. It includes a 22-position keypad and supports serial and parallel computer interfaces.
Voltage Outputs: Three voltage outputs provide different levels of signal processing, suitable for diagnostic and measurement purposes.

Specifications:

General Measurement: Utilizes a single Hall effect sensor with features like linearity and temperature compensation.
DC Measurement: Offers high resolution and accuracy with various probe types and ranges.
AC RMS Measurement: Provides accurate readings across a wide frequency range with specified resolution and accuracy.

Ordering Information: The document lists part numbers and descriptions for ordering the Model 455 DSP Gaussmeter, including options for different power configurations.

Overview: The document provides detailed specifications and features of the Model 455 and Model 460 Gaussmeters by Lake Shore Cryotronics, Inc. It includes information on accessories, calibration services, interfaces, voltage outputs, general specifications, and probe compatibility.

Model 455 Gaussmeter:

Accessories: Includes I/O mating connectors, zero gauss chamber, user manual, and various cables with EEPROM for probe extension.
Calibration Services: Offers new instrument calibration and recalibration with certificates and data.
Interfaces: Supports RS-232C and IEEE-488.2 with LabVIEW™ driver support.
Voltage Outputs: Three configurations with varying ranges, scales, and accuracies, all sharing a 25-pin I/O connector.
General Specifications: Operates within specific temperature and power requirements, with CE mark approval.
Probes and Extensions: Compatible with a range of probes and extension cables, both calibrated and uncalibrated.

Model 460 Gaussmeter:

Product Description: Designed for 3-axis measurements, it combines three gaussmeters into one, suitable for materials analysis and field mapping.
Measurement Modes: Operates in DC, RMS, and Peak modes with high accuracy and resolution.
Range and Resolution: Offers full scale ranges from 300 mG to 300 kG with high resolution in DC mode.
Interface: Equipped with IEEE-488 and RS-232C interfaces for command and data exchange.
Probes and Sensors: Offers a variety of probes and sensors, factory-calibrated for accuracy.
Display: Features a vacuum fluorescent display for field readings and instrument parameters.
General Specifications: Includes power requirements, size, weight, and CE mark approval.

Additional Information: The document also includes ordering information, available accessories, and general measurement features for both models.

Overview: The document provides detailed information about the Model 421 Gaussmeter, a high-performance instrument designed for magnetic measurement applications. It highlights the device's specifications, features, and compatibility with various probes, emphasizing its accuracy, resolution, and usability in both manual and automated settings.

Performance: The Model 421 Gaussmeter is designed to meet stringent performance requirements across various magnetic measurement applications. It offers improved accuracy, resolution, noise floor, and update rate, making it suitable for research laboratories and industrial applications.

Usability and Throughput: The device features a large, bright vacuum fluorescent display that is easily readable in any lighting condition. It provides quick feedback on probe or magnet positioning and includes features like Max Hold, Alarm, and Sort to streamline operations.

Automation: The Model 421 supports automated test configurations with its RS-232C serial computer interface, analog voltage outputs, and alarm relay, allowing for automation without a computer.

Probes: Compatible with most Lake Shore gaussmeter Hall probes, the Model 421 offers factory-calibrated probes with programmable read-only memory for automatic calibration data reading. Custom probe designs are available for specific applications.

Display and Interface: The device includes a 2-line by 20-character vacuum fluorescent display for reporting field readings and other features. It supports various display configurations and allows for display brightness control. The RS-232C interface supports multiple baud rates and is compatible with LabVIEW™ drivers.

Specifications: The document lists detailed specifications for the Model 421, including input, update rate, probe compatibility, measurement features, DC and AC measurement capabilities, front panel features, and interface options. It also provides ordering information and available accessories.

Additional Models: The document briefly describes the Model 410 Gaussmeter, a handheld device for magnetic field measurements, and the Model 480 fluxmeter, designed for measuring total flux in industrial and measurement systems settings.

Overview of Model 480 Fluxmeter: The Model 480 Fluxmeter is designed for high-resolution and low-drift analytical measurements, particularly in magnetizing processes. It features a fast peak capture capability, allowing it to handle rapid magnetizing pulses, and can capture both positive and negative peaks from the same pulse. The device is protected against high voltages during magnetizing.

Key Specifications:

5¾-digit DC resolution (1 part out of ±300,000)
Automatic drift compensation
AC frequency response up to 50 kHz
IEEE-488 and serial interfaces
Storage for parameters of up to 10 coils

Materials Analysis: The fluxmeter's high resolution is supported by a low noise floor and configurable filters to maintain quiet readings. It includes automatic and manual drift adjustment modes to optimize low drift characteristics.

AC Magnetic Fields: The Model 480 can measure AC fields over a wide frequency range using simple sensing coils, although applications are limited to field volumes as large as or larger than the coil.

Drift Adjustment: The Model 480 features a built-in drift algorithm that adjusts drift when idle, ensuring readiness for precision low-drift measurements. Manual drift adjustment is also available.

Display and Interfaces: The device has a 2-line by 20-character vacuum fluorescent display for reporting field readings and other features. It includes IEEE-488.2 and RS-232C serial interfaces for automated data collection.

Specifications:

Measurement: 1 input, 2-lead, ground-referenced
Input resistance: 100 kΩ or 10 kΩ
Maximum operating input voltage: 60 V
DC resolution: To 5¾ digits
AC frequency response: 2 Hz to 50 kHz

Accessories and Ordering Information: The Model 480 comes with various accessories, including terminal block connectors and a user manual. Optional accessories include IEEE-488 interface cables and calibration certificates. Custom probes and coils are available upon request.

Gaussmeter Hall Probes: When selecting a Hall probe, consider the application requirements to avoid unnecessary accuracy or fragility. Lake Shore offers a range of probes, factory-calibrated for accuracy and interchangeability, with programmable read-only memory for automatic calibration data reading.

Probe Selection Guidelines:

Choose a probe matching the application needs.
Consider probe fragility and protection.
Be cautious with aluminum stemmed probes in AC fields due to eddy currents.
Consider stem length and active area size based on application requirements.

Overview: The document provides detailed technical specifications and guidelines for selecting and using Hall effect probes, specifically focusing on HST and HSE probes made from highly doped indium arsenide. These probes are used in measuring magnetic fields and are designed to withstand various types of radiation.

Radiation Effects: The document notes that gamma radiation has minimal impact on Hall generators, while proton radiation up to 10 Mrad results in less than 0.5% sensitivity change. Neutron radiation can cause a 3% to 5% decrease in sensitivity, but effects tend to saturate over time.

Probe Configurations: The document describes several probe configurations:

Transverse Probes: Rectangular in shape, these measure fields normal to their stem width and are suitable for general-purpose measurements.
Axial Probes: Round in shape, these measure fields normal to their end and are often used with solenoids.
Flexible Probes: Feature a flexible stem but are more fragile, suitable for narrow-gap applications.
Tangential Probes: Designed to measure fields parallel to a surface, not for general use.

Frequency Considerations: Hall effect gaussmeters can measure both static and periodic fields. Metal stem probes are ideal for DC and low-frequency AC measurements, while non-metal stems are better for high-frequency AC fields due to the absence of eddy currents.

Durability and Handling: All probes are fragile, and care must be taken to avoid bending or shocking the sensor. The document advises selecting robust probes for specific applications and provides guidelines for clamping and handling.

Polarity and Measurement: The document explains the polarity of transverse and axial probes and provides definitions for key terms related to probe measurements.

Active Area and Gradients: The document discusses the importance of understanding the active area in relation to field gradients, noting that HSE and HST probes have a nominal active area of about 1 mm diameter.

Probe Specifications: Detailed specifications for various probe models are provided, including dimensions, materials, frequency ranges, accuracy, temperature coefficients, and operating temperature ranges.

Conclusion: The document serves as a comprehensive guide for selecting and using Hall effect probes, emphasizing the importance of understanding probe configurations, frequency considerations, and handling procedures to ensure accurate and reliable measurements.

Overview: This document provides detailed specifications and ordering information for various types of probes and accessories used in magnetic field measurement, particularly for models 460, 450, 421, 475, and 455 Gaussmeters. It includes transverse, tangential, cryogenic, and gamma probes, as well as calibration data and extension cables.

Specifications:

Transverse Probes: Available in metal, flexible, and brass stem configurations with varying dimensions. Specific models include J02-VG, MMT-6J04-VG, and others.
Gamma Probes: Non-metallic axial probes like HMLA-5006-HJ and MLA-5006-HJ.
2-Axis and 3-Axis Probes: Models such as MMY-1802-UH and MMZ-2502-UH, with lengths ranging from 2 to 60 inches.
Calibration Data: New product calibration and recalibration certificates are available for various models, ensuring accuracy and compliance.

Procedures:

Calibration: Probes and extension cables must be calibrated together at Lake Shore to maintain accuracy. Specific calibration data and certificates are provided for different probe models.
Extension Cables: Necessary for maintaining probe accuracy, with specific models for different Gaussmeters. Cables are available in various lengths and can be factory-calibrated.

Recommendations:

Use zero gauss chambers to shield probes from external magnetic fields for accurate measurements.
Ensure proper calibration of probes and cables to maintain measurement accuracy.

Accessories:

Hall Probe Stands: Adjustable stands for positioning probes, available in different post heights.
Reference Magnets: Available in axial and transverse configurations for calibration and testing purposes.

Technical Insights:

Hall Generator Theory: Explains the Hall effect and its application in magnetic field sensors, detailing the relationship between Hall voltage, magnetic field, and sensor configuration.
Using Hall Generators: Guidelines for connecting Hall generators to Gaussmeters, including cable configurations and sensitivity constraints.

Contact Information: For further inquiries, contact Lake Shore Cryotronics, Inc. via their website or provided contact details.

Specifications:
The document outlines specifications for various Hall generators and sensors, including set voltage, operating temperature range, and temperature coefficients. The set voltage varies with a maximum of ±2.8 mV, and the operating temperature range is from -40 °C to +100 °C. The mean temperature coefficient of magnetic sensitivity and offset are provided, with values such as -0.06%/°C and ±1.2 µV/°C respectively.

Procedures and Standards:
Details on the compatibility of sensors with specific gaussmeters are provided, such as compatibility with the Lake Shore Model 410 gaussmeter. The document also includes ordering information for various parts and accessories, emphasizing that specifications are subject to change.

Recommendations:
Recommendations for use include the Model 642 electromagnet power supply, which is noted for its low noise and high resolution, making it suitable for laboratory settings. It supports a true 4-quadrant output, eliminating the need for external switching.

Data and Analysis:
Data on magnetic sensitivity changes with temperature is provided, indicating that sensitivity generally increases as temperature drops below 300 K, but decreases between 200 K and 100 K. The document includes tables and figures illustrating these changes.

Ordering Information:
Part numbers and descriptions for various Hall generators, sensors, and accessories are listed, such as the HGA-2010 and HGT-1010, along with their specific applications and features.

Additional Components:
The document describes Helmholtz coils and search coils for use with specific models, detailing their field accuracy, resistance, and operating temperature ranges. These components are used for field standards and magnet moment measurements.

Conclusion:
The document provides comprehensive technical specifications and guidelines for selecting and using Hall generators, sensors, and related accessories, emphasizing compatibility and performance under various conditions.

Overview: The document provides detailed specifications and features of the Model 642 Electromagnet Power Supply and the 660 Series Bipolar Magnet Power Supplies, including Models 665 and 668. These devices are designed for precise control and protection in electromagnet applications.

Specifications: The Model 642 is a bipolar, 4-quadrant DC current source with a current range of ±70 A and a compliance voltage of ±35 V. It offers a power output of 2450 W and operates within a load resistance range of 0.4 Ω to 0.6 Ω. The device features a resolution of 0.1 mA for current readings and 1 mV for voltage readings, with high accuracy and stability.

Protection Features: The Model 642 includes built-in protection against short circuits, line loss, over-voltage, over-current, and over-temperature. It also monitors internal temperatures and provides warnings before limits are exceeded, automatically shutting down if necessary.

Interfaces: The device supports IEEE-488 and RS-232C interfaces for remote control and data access. It includes analog monitors for output current and voltage, with specific sensitivities and accuracies.

Display and Controls: The Model 642 features a vacuum fluorescent display for simultaneous current and voltage readings, along with LEDs for status indication. The keypad allows direct access to common functions and can be locked for security.

Cooling and Power Requirements: The power supply requires a cooling water flow rate of 5.7 L/min and operates on a 3-phase power supply with specific voltage and current requirements. It is housed in a rack-mountable enclosure.

660 Series Bipolar Magnet Power Supplies: Models 665 and 668 are linear, bipolar power supplies with outputs of ±100 A, ±50 V (5 kW) and ±135 A, ±65 V (8.8 kW) respectively. They offer high stability, low ripple noise, and are suitable for various magnetic test applications.

Additional Features: The 660 series includes fault detection, thermal protection, and remote programming capabilities. They are designed for smooth field generation without electromagnetic interference, making them ideal for sensitive experiments.

Specifications and Operating Environment:
The document outlines specifications for electromagnets and associated equipment. The operating environment includes an ambient temperature range of +10 °C to +30 °C and humidity of 55% ±10%. Cooling water should be maintained between +15 °C to +25 °C. Internal condensation is cautioned against as it can damage the power supply.

Mechanical Outline:
The equipment is housed in a freestanding rack cabinet with locking wheels and lifting eye bolts. Two models are specified: Model 665 and Model 668, with dimensions of 1.35 m high × 0.7 m deep × 0.6 m wide. Model 665 weighs 250 kg, while Model 668 weighs 354 kg.

Ordering Information:
Various models are available with different voltage and power specifications. For example, Model 665-208 operates at ±100 A, ±50 V, 5.0 kW, 208 VAC. Customers are advised to consult Lake Shore for other available voltages.

Electromagnets:
The EM4 and EM7 series electromagnets feature continuously adjustable poles for rapid air gap changes, water-cooled coils for stability, and precise pole alignment. The EM4 is compact for bench-top mounting, while the EM7 offers larger air gaps.

Field Uniformity:
The document provides detailed specifications on field uniformity for both EM4 and EM7 magnets, indicating the uniformity over a 1% cylindrical volume.

Support Structures:
Support structures for the electromagnets are available, such as the EM4-HSTAND-3, which is a 3-level aluminum structure, and the EM4-STAND-2, a 2-level structure.

Additional Requirements:
Requirements include a water supply or chiller, lifting equipment, a magnet power supply, and a supportive area for the magnet weight.

Recirculating Chillers:
Lake Shore offers NesLab M-75 and M-150 recirculating chillers, designed for continuous duty circulation with CFC-free refrigeration systems. These chillers are compact and designed to minimize floor space usage.

Conclusion:
The document provides comprehensive specifications and ordering information for electromagnets and associated equipment, emphasizing the importance of proper environmental conditions and support structures for optimal operation.

Specifications:
The document provides detailed specifications for various pumps and chillers, including flow rates, temperature ranges, and dimensions. The pumps are identified as PD-2 and CP-55, with a temperature range of 5°C to 35°C and a temperature stability of ±0.15°C. The reservoir volume is 0.5 gallons (1.8 liters), and the case dimensions are provided in both inches and millimeters. Shipping weights vary between 91 kg and 130 kg.

Performance and Recommendations:
Performance specifications are influenced by temperature, ambient conditions, or coolant changes. The chillers are rated at a 65% duty cycle, suitable for common magnet testing applications. For higher duty cycle needs, a larger chiller is recommended.

System Features:
The Field Controlled Electromagnet Platforms (FCP) feature adjustable air gaps, water-cooled coils, and precision yokes for field homogeneity and stability. The electromagnets are compact and suitable for bench-top mounting. The power supplies offer stable current regulation and bipolar output, eliminating the need for current reversal contactors.

Control Features:
The Model 475 DSP gaussmeter integrates closed-loop field control, eliminating the need for separate software control. It uses feedback from the gaussmeter Hall probe to maintain the magnetic field density at the user-set control setpoint. The system updates the analog output every 33 ms for stability.

Product Description:
The FCP integrates hardware and firmware for a variable magnetic field platform, suitable for user-designed magnetic measurement systems. It includes an electromagnet, bipolar power supply, DSP gaussmeter, and Hall probe.

Ordering Information:
Customers can specify voltage and pole cap diameter. Part numbers are provided for different electromagnet configurations.

Units for Magnetic Measurement:
The document includes a conversion table for magnetic measurement units, detailing the conversion between Gaussian and SI units.

Company Information:
Lake Shore Cryotronics, Inc. is a leader in measurement and control solutions, specializing in cryogenic temperatures and magnetic fields.

Catalog excerpts

3 Full-scale ranges from 35 mG to 350 kG > DC measurement resolution to 0.02 mG Basic DC accuracy of 0.05% DC to 50 kHz frequency range (probe-dependent) 15 band-pass and 3 low-pass AC filters Peak capture to 20 ѵs pulse widths Data buffer sampling rates to 1000 readings per s > Lake Shore combined the technical advantages of digital signal processing with over a decade of experience in precision magnetic field measurements to produce the first commercial digital signal processor (DSP) based Hall effect gaussmeter, the Model 475. DSP technology creates a solid foundation for accurate, stable,...

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The Probe Connection The Model 475 is only half of the magnetic field measurement equation. For the complete solution, Lake Shore offers a full complement of standard and custom Hall effect probes in a variety of sizes and sensitivities. See page 26 for complete details on properly selecting a Hall effect probe. See pages 29 38 for a complete listing of available probe models. Peak Measurement Mode Pulsed fields are measured in Peak mode, which is a natural extension of the high-speed data acquisition necessary for DSP operation. Fast instrument sample rates permit capture of positive and negative...

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Frequency Display: When operating in RMS mode, the gaussmeter can display the frequency of the measured AC field along with a field reading (up to 20 kHz). > The Model 475 offers a variety of features to enhance the usability and convenience of the gaussmeter. The Model 475 has several capabilities that allow the best possible measurements with Lake Shore probes. These firmware-based features work in tandem with the probes calibration and programming to ensure accurate, repeatable measurements and ease of setup. Many of the features require probe characteristics that are stored in the probe connectorҒs...

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Display Keypad Voltage Output 2 The Model 475 has a 2-line by 20-character vacuum fluorescent display. During normal operation, the display is used to report field readings and give results of other features such as max/min or relative. The display can also be configured to show probe temperature or frequency. When setting instrument parameters, the display gives the operator meaningful prompts and feedback to simplify operation. The operator can also control display brightness.Following are four examples of the various display configurations: The instrument has a 22-position keypad with individual...

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L (in)D (in)A (in)Active area (in)Stem materialFrequency rangeUsable full scale ranges Corrected accuracy (% rdg)Operating temp range (װC)Temp coefficient (max) zeroTemp coefficient (max) calibrationContains temp sensorHMNA-1904-VR 4 0.1250.187 dia ѱ0.0050.005 0.0030.030 dia (approx)Fiberglass epoxyDC to 20 kHz HSE 3.5 G, 35 G, 350 G, 3.5 kG, 35 kGѱ0.20% to 30 kG and 0.25% 30 to 35 kG0 ѰC to +75 Cб0.09 G/Cб0.04%/CYes HMMA-2502-VR 2 б0.0630.25 dia 0.0060.015 ѱ0.005AluminumDC to 10 kHz HMNA-1904-VF 4 0.1250.187 dia ѱ0.0050.005 0.003Fiberglass epoxyDC to 800 Hz HST-4 35 G, 350 G, 3.5 HMMA-2502-VF...

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AC accuracy: 1% of reading Ѣɥ 1% of full-scale range AC frequency range: 1 Hz to 1 kHz, narrow band mode; 100 Hz to 20 kHz, wide band mode AC band limiting (filters): 18 user-selected frequencies of 3 low-pass or 15 band-pass > (Does not include probe error, unless otherwise specified) > UHS Probe Input type: Single Hall effect sensor Probe features: Measurement features: Linearity Compensation, Temperature Compensation, Auto Probe Zero, and Hot Swap Autorange, Max/Min Hold, Relative Mode, and Frequency Probe TypeRanges4-digitResolution Measurement resolution (RMS noise floor): Display resolution:...

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Voltage Output 3 Range: 10 V Configuration: Scale: Resolution: User-specified (defaults same as Voltage Output 2) 16-bit, 0.3 mV Voltage output of compensated DC or RMS field value, generated by DAC (also used for field control) Update rate: 30 updates/s Accuracy: ѱ2.5 mV Noise: 0.3 mV Minimum load resistance: 1 k ѢĦ (short circuit protected) Connector: In 25-pin I/O connector Hall sensor compatibility: Front panel programmable sensitivity and serial number for user-supplied Hall sensorsee page 40 Probes and Extensions Extension cable compatibility: Calibrated or uncalibrated probe extension...

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The Probe Connection The Model 455 is only half of the magnetic measurement equation. For the complete solution, Lake Shore offers a full complement of standard and custom Hall effect probes in a variety of sizes and sensitivities. One of ten common standard Hall probes is included with the Model 455. See page 13 for details on the ten Hall probes you can choose to get with the Model 455. Peak Measurement Mode Pulsed fields are measured in Peak mode, which is a natural extension of the high- speed data acquisition necessary for DSP operation. Fast instrument sample rates permit capture of positive...

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Hall Effect Generators (Magnetic Field Sensors): The Model 455 will operate with a discrete Hall effect generator when a suitable probe is not available. Users can program nominal sensitivity and serial number into an optional MCBL-6 blank connector to provide all gaussmeter functions except field and temperature compensation. If no sensitivity information is available, the Model 455 reverts to resistance measurement. Extension Cables: The complex nature of Hall effect measurements make it necessary to match extension cables to the probe when longer cables are needed. Keeping probes and their...

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Computer Interface Two computer interfaces are included with the Model 455: serial (RS-232C) and parallel (IEEE-488). Both allow setup of all instrument parameters and read-back of measured values. The reading rate over the interface is nominally 30 readings per second. LabVIEW drivers are provided to instrument usersٗconsult Lake Shore for availability. Voltage Output 3 The third output provides a voltage proportional to measured field with the most signal processing of the three outputs. All probe compensation available to the display readings, including temperature compensation, can be performed...

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Magnetics Catalog

Magnetics Catalog

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